"Barbed Wire Fence Charged With High Current Surrounds Country's Largest Radio Plant./Seven foot barbed wire fence which surrounds country's largest radio plant at Challos Heights near San Diego, Calif./Photo also shows U.S. soldier on guard, one of the detachment that patrols the grounds of the station day and night./The plant is the largest station in the United States. The towers are over 600 feet in height. Messages from this plant have been sent to Berlin and received from that city./Washington recently ordered that the station be carefully guarded and a barbed wire fence seven feet high was erected around the grounds. The wire is charged with 30,000 volts. In addition to this effective barrier the plant is guarded day and night by the U.S. Soldiers. No one is permitted entrance to the station or surrounding territory unless properly identified and vouched for."
